WENS center holds a very strong and reliable relationship with suppliers of copper cathode from America, Russia and South Africa and Urea from Ukraine . We are guaranteed with supply abundant copper cathode and Urea annually .In short , WENS center enjoys many advantages compared to other companies in the world. The price will depend on your quantity. Means the more you buy , the lower the price will be. If you have any demand, please feel free to contact me.